Home / 8,781.40-12,118.26-5,198.82

Finding the Fourth Proportional to 8,781.40, 12,118.26 and 5,198.82

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Solution

The fourth proportional to 8,781.40, 12,118.26 and 5,198.82 is: 7,174.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.40 : 12,118.26 = 5,198.82 : x
  2. Step 2: Convert to fraction form
    8,781.40/12,118.26 = 5,198.82/x
  3. Step 3: Cross multiply
    8,781.40x = 12,118.26 × 5,198.82
  4. Step 4: Simplify right side
    8,781.40x = 63,000,652.45
  5. Step 5: Solve for x
    x = 63,000,652.45/8,781.40
  6. Step 6: Final answer
    x = 7,174.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.